TOWCTRANS(3) Linux Programmer's Manual TOWCTRANS(3)

towctrans - wide-character transliteration

#include <wctype.h>
wint_t towctrans(wint_t wc, wctrans_t desc);

If wc is a wide character, the towctrans() function translates it according to the transliteration descriptor desc. If wc is WEOF, WEOF is returned.
desc must be a transliteration descriptor returned by the wctrans(3) function.

The towctrans() function returns the translated wide character, or WEOF if wc is WEOF.

For an explanation of the terms used in this section, see attributes(7).
Interface Attribute Value
towctrans () Thread safety MT-Safe

POSIX.1-2001, POSIX.1-2008, C99.

The behavior of towctrans() depends on the LC_CTYPE category of the current locale.

towlower(3), towupper(3), wctrans(3)
2015-08-08 GNU